symfony @oneToMany 关系只返回集合中的最后一个对象

Question

I have a situation and not really sure what I'm doing wrong. in Sumfony 3.3 I've created a relation between entity Page and Language, where Page is related to multiple Languages, and when I search for a Page and get Page object but property Languages returns collection with only last Language object. No matter how many objects are there in collection it always returns last.

Page Entity:

/**
 * @ORM\OneToMany(targetEntity="Language", mappedBy="page", cascade={"ALL"}, indexBy="page_id")
 */
private $languages;

Language entity:

/**
 * @ORM\ManyToOne(targetEntity="Page", inversedBy="languages")
 */
private $page;

public function addLanguage(\AppBundle\Entity\Langaugee $language)
{
    $this->languages[] = $language;

    return $this;
}

public function removeLanguage(\AppBundle\Entity\Language $language)
{
    $this->$languages->removeElement($language);
}

public function getLanguages()
{
    return $this->languages;
}

Page object is fetching in PageService:

public function getPageByName($name)
{
return $this->pageRepository->findBy(array("name"=>$name));
}

Since property $languages by default set on lazy, JMS serializer when serializes Page object it's fetching languages collection

Did anyone had this problem?

Answer 1

After thorough debugging, I figure it out that indexBy is misused here. Defined indexBy = page_id provided always the same value so every record that is mapped to entity in SimpleObjectHydrator overrun the existing record, leaving only last added Language object in collection

Answer 2

I know Its an old post, but solution below worked for me.

I had to clear EntityManager cache in my repository class method by calling this method just before fetching data.

$this->_em->clear();

here _em is the default EntityManager available in the repository class.